Makefile: make the CC definition conditional

By hardcoding CC's definition in the Makefile, all the external gcc
parameters set by tune settings are lost. This causes compile failure
with x32 toolchain

Signed-off-by: Maxin B. John <maxin.john@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>

diff --git a/Makefile b/Makefile
index fd79cfbc04baa3760ed16e80d07f17097017b576..5fd7f166e7e14f24078b2394398234342930b227 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ KLIBC=/home/src/klibc/klibc-0.77
 
 KLIBC_GCC = gcc -nostdinc -iwithprefix include -I$(KLIBC)/klibc/include -I$(KLIBC)/linux/include -I$(KLIBC)/klibc/arch/i386/include -I$(KLIBC)/klibc/include/bits32
 
-CC = $(CROSS_COMPILE)gcc
+CC ?= $(CROSS_COMPILE)gcc
 CXFLAGS ?= -ggdb
 CWFLAGS = -Wall -Werror -Wstrict-prototypes -Wextra -Wno-unused-parameter
 ifdef WARN_UNUSED